Graduate School of Languages and Linguistics

福井 直樹

フクイ ナオキ  (Naoki Fukui)

基本情報

所属
上智大学 言語科学研究科言語学専攻 教授
学位
教養学士(国際基督教大学)
教育学修士(国際基督教大学)
言語学博士(1986年6月 マサチューセッツ工科大学)

研究者番号
60208931
J-GLOBAL ID
200901046814317810
researchmap会員ID
5000064245

ポストドクトラル・フェロー(マサチューセッツ工科大学認知科学センター):理論言語学、認知科学研究(1986-1987)
招聘研究員(国際電気通信基礎技術研究所):理論言語学、形式統辞法研究(1999夏)
国際交流基金フェロー(東京大学):理論言語学研究(2000年10月〜2001年7月)

ヒトに固有な認知能力である言語機能(Faculty of Language)の本質と機能の研究を通して人間性の本質とも言うべきものを突き止めたいと思っている。普遍文法の諸原理、比較統辞論、パラメータの本質と組織化、等々が主な研究分野である。言語に対する自然科学的アプローチを基礎にして、言語の「社会性」に関しても研究範囲を拡げていきたいと思っている。

(研究テーマ)
一般言語理論およびパラメータの理論、比較統辞法、言語獲得の数理モデル、言語の脳科学


委員歴

 7

論文

 55
  • Keita Umejima, Isso Nakamura, Naoki Fukui, Mihoko Zushi, Hiroki Narita, Kuniyoshi L. Sakai
    Frontiers in Psychology 14 1-17 2023年7月19日  査読有り
    Surface linear (left-to-right) arrangements of human languages are actually an amalgam of the core language system and systems that are not inherently related to language. It has been widely recognized that an unbounded array of hierarchically structured linguistic expressions is generated by the simplest combinatorial operation “Merge,” and the notion of Merge-generability has been proposed as a key feature that characterizes structural dependencies among linguistic elements. Here we tested Merge-generable dependencies by using a Subject-Predicate matching task, which required both linguistic capacity and short-term memory. We used three types of dependency: Nesting, Crossing, and Grouping as the control. The Nesting dependency is totally Merge-generable, while the Crossing dependency requires some additional processes for memory-based ordering. In order to identify the regions employed for these two dependencies, we directly compared cortical responses to the sentence stimuli (with noun phrases and an adverb as the first half of stimuli, and with verbs as the latter) using functional magnetic resonance imaging (fMRI), and the following results were obtained. First, for the Nesting – Crossing contrast, significant activations were observed in the bilateral lateral premotor cortices (LPMCs) and inferior frontal gyri, left middle temporal gyrus, and bilateral angular/supramarginal gyri, indicating engagement of the syntax-related networks. In contrast, the Crossing – Nesting contrast showed focal activations in the left fusiform gyrus, lingual gyrus, and middle occipital gyrus (L. FG/LG/MOG). Secondly, for the first half of the Nesting stimuli, signal changes in the bilateral LPMCs were well fitted with the estimates of computational costs to search the workspace and to select items (Σ operations). Moreover, for the latter half of the Crossing stimuli, the signal changes in the L. FG/LG/MOG were differentially fitted with the estimates of loads related to the ordering of elements/words (numbers of Ordering). Thirdly, these fitting models were by far more likely than the exchanged estimates between bilateral LPMCs and L. FG/LG/MOG, confirming a double dissociation for primary processes with Σ and Ordering. In conclusion, these results indicate that separate cortical networks are differentially employed, and their careful elucidation will provide further insights and challenges.
  • Naoki Fukui
    Gengo Kenkyu Anthology 3 1-34 2023年  査読有り招待有り筆頭著者
  • 福井直樹
    言語研究 161 1-33 2022年3月  査読有り招待有り筆頭著者
  • Kyohei Tanaka, Isso Nakamura, Shinri Ohta, Naoki Fukui, Mihoko Zushi, Hiroki Narita, Kuniyoshi L. Sakai
    Frontiers in Psychology 10 2019年11月29日  査読有り
  • 福井直樹
    Southern Review 33 3-19 2018年12月  招待有り

MISC

 11

書籍等出版物

 36

講演・口頭発表等

 9

共同研究・競争的資金等の研究課題

 6

社会貢献活動

 2

その他

 118